keyword
MENU ▼
Read by QxMD icon Read
search

Pacing

keyword
https://www.readbyqxmd.com/read/28646653/cryo-em-beyond-the-microscope
#1
REVIEW
Lesley A Earl, Veronica Falconieri, Jacqueline Ls Milne, Sriram Subramaniam
The pace at which cryo-EM is being adopted as a mainstream tool in structural biology has continued unabated over the past year. Initial successes in obtaining near-atomic resolution structures with cryo-EM were enabled to a large extent by advances in microscope and detector technology. Here, we review some of the complementary technical improvements that are helping sustain the cryo-EM revolution. We highlight advances in image processing that permit high resolution structure determination even in the presence of structural and conformational heterogeneity...
June 21, 2017: Current Opinion in Structural Biology
https://www.readbyqxmd.com/read/28645448/takotsubo-syndrome-presenting-as-syncope-in-a-patient-with-permanent-pacemaker
#2
Bharatraj Banavalikar, Sivasankaran Sivasubramonian, Narayanan Namboodiri, Krishna Kumar Mohanan Nair, Dibya Ranjan Behera, Ajitkumar Valaparambil
Takotsubo syndrome is an acute reversible heart failure syndrome triggered by physical or emotional stress, especially in postmenopausal women. Herein, we describe a case of a 31-year-old pacemaker dependent lady who presented with syncope after she was bereaved of her father. Electrocardiogram at admission revealed ventricular paced rhythm at 60/min, prolonged QT interval and frequent runs of torsades de pointes. Transthoracic echocardiogram and left ventriculogram revealed findings typical of Takotsubo syndrome...
May 18, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28645243/extended-periarterial-sympathectomy-evaluation-of-long-term-outcomes
#3
Collier S Pace, Wyndell H Merritt
BACKGROUND: Periarterial sympathectomy is a proposed surgical treatment for patients with refractory Raynaud syndrome; however, there is debate regarding the indications and extent of dissection. Due to the segmental arterial sympathetic innervation, we favor an extended sympathectomy in concert with vein graft reconstruction of occluded vessels when necessary. The purpose of this study is to examine outcomes of extended periarterial sympathectomy in our patients. METHODS: A retrospective chart review was performed on 46 patients who underwent 58 periarterial sympathectomies (12 bilateral) since 1981...
June 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28645225/medication-regimen-complexity-and-low-adherence-in-older-community-dwelling-adults-with-substantiated-self-neglect
#4
Sharon Abada, Leslie E Clark, Arup K Sinha, Rui Xia, Kathleen Pace-Murphy, Renee J Flores, Jason Burnett
OBJECTIVE: Determine whether medication regimen complexity predicts medication adherence levels in a sample of community-dwelling adults 65 years and older with Adult Protective Services-substantiated self-neglect. METHODS: A cross-sectional analysis of baseline data ( N = 31 participants) from a pilot intervention to increase medication adherence among the target group was performed. The Medication Regimen Complexity Index (MRCI) and the 8-item Morisky Medication Adherence Scale (MMAS-8)™ were the primary independent and dependent measures, respectively...
June 1, 2017: Journal of Applied Gerontology: the Official Journal of the Southern Gerontological Society
https://www.readbyqxmd.com/read/28644868/electrophysiological-alterations-in-a-murine-model-of-chronic-coxsackievirus-b3-myocarditis
#5
Sven Kaese, Robert Larbig, Matthias Rohrbeck, Gerrit Frommeyer, Dirk Dechering, Jan Olligs, Sabine Schönhofer-Merl, Rainer Wessely, Karin Klingel, Guiscard Seebohm, Lars Eckardt
INTRODUCTION: Coxsackievirus B3 (CVB3) is known to induce acute and chronic myocarditis. Most infections are clinically unapparent but some patients suffer from ventricular arrhythmias (VA) and sudden cardiac death (SCD). Studies showed that acute CVB3 infection may cause impaired function of cardiac ion channels, creating a proarrhythmic substrate. However, it is unknown whether low level CVB3+ expression in myocytes may cause altered cardiac electrophysiology leading to VA. METHODS: Cellular electrophysiology was used to analyze cellular action potentials (APs) and occurrence of afterdepolarizations from isolated cardiomyocytes of wildtype (WT) and transgenic CVB3ΔVP0 (CVB3+) mice...
2017: PloS One
https://www.readbyqxmd.com/read/28643605/novel-simulation-device-for-targeting-tumors-in-laparoscopic-ablation-a-learning-curve-study
#6
Zeljka Jutric, Jan Grendar, William L Brown, Maria A Cassera, Ronald F Wolf, Paul D Hansen, Chet W Hammill
INTRODUCTION: A novel 3-dimensional (3D) guidance system was developed to aid accurate needle placement during ablation. METHODS: Five novices and 5 experienced hepatobiliary surgeons were recruited. Using an agar block with analog tumor, participants targeted under 4 conditions: in-line with the ultrasound plane using ultrasound, in-line using 3D guidance, 45° off-axis using ultrasound, and off-axis using 3D guidance. Time to target the tumor, number of withdrawals, and the National Aeronautics and Space Administration Task Load Index were collected...
June 1, 2017: Surgical Innovation
https://www.readbyqxmd.com/read/28643082/the-influence-of-solar-power-plants-on-microclimatic-conditions-and-the-biotic-community-in-chilean-desert-environments
#7
Anna Suuronen, Christian Muñoz-Escobar, Anssi Lensu, Markku Kuitunen, Natalia Guajardo Celis, Pablo Espinoza Astudillo, Marcos Ferrú, Andrés Taucare-Ríos, Marcelo Miranda, Jussi V K Kukkonen
The renewable energy sector is growing at a rapid pace in northern Chile and the solar energy potential is one of the best worldwide. Therefore, many types of solar power plant facilities are being built to take advantage of this renewable energy resource. Solar energy is considered a clean source of energy, but there are potential environmental effects of solar technology, such as landscape fragmentation, extinction of local biota, microclimate changes, among others. To be able to minimize environmental impacts of solar power plants, it is important to know what kind of environmental conditions solar power plants create...
June 22, 2017: Environmental Management
https://www.readbyqxmd.com/read/28642606/transposable-elements-in-cancer
#8
REVIEW
Kathleen H Burns
Transposable elements give rise to interspersed repeats, sequences that comprise most of our genomes. These mobile DNAs have been historically underappreciated - both because they have been presumed to be unimportant, and because their high copy number and variability pose unique technical challenges. Neither impediment now seems steadfast. Interest in the human mobilome has never been greater, and methods enabling its study are maturing at a fast pace. This Review describes the activity of transposable elements in human cancers, particularly long interspersed element-1 (LINE-1)...
July 2017: Nature Reviews. Cancer
https://www.readbyqxmd.com/read/28642329/experimental-and-computational-insight-into-human-mesenchymal-stem-cell-paracrine-signaling-and-heterocellular-coupling-effects-on-cardiac-contractility-and-arrhythmogenicity
#9
Joshua Mayourian, Timothy J Cashman, Delaine K Ceholski, Bryce V Johnson, David Sachs, Deepak A Kaji, Susmita Sahoo, Joshua M Hare, Roger J Hajjar, Eric A Sobie, Kevin D Costa
Rationale: Myocardial delivery of human mesenchymal stem cells (hMSCs) is an emerging therapy for treating the failing heart. However, the relative effects of hMSC-mediated heterocellular coupling (HC) and paracrine signaling (PS) on human cardiac contractility and arrhythmogenicity remain unresolved. Objective: To better understand hMSC PS and HC effects on human cardiac contractility and arrhythmogenicity by integrating experimental and computational approaches. Methods and Results: : Extending our previous hMSC-cardiomyocyte HC computational model, we incorporated experimentally calibrated hMSC PS effects on cardiomyocyte L-type calcium channel/SERCA activity and cardiac tissue fibrosis...
June 22, 2017: Circulation Research
https://www.readbyqxmd.com/read/28642188/costal-graft-as-a-support-for-bone-regeneration-after-mandibular-juvenile-ossifying-fibroma-resection-an-unusual-case-report
#10
F Fauvel, R Pace, F Grimaud, F Marion, P Corre, B Piot
Spontaneous regeneration of bone tissue after mandibular resection is rare in adults, although it does often take place in children. Periosteum conservation appears to play a major role in this healing process. We here report regarding a 5-year-old boy who exhibited a large mandibular trabecular juvenile ossifying fibroma. The lesion was treated by mandibulectomy, with careful preservation of the periosteal layer and immediate reconstruction with a costal graft by an intra-oral approach. Monitoring over the course of a year revealed spontaneous mandibular regeneration, and it allowed for a series of measurements of the graft to be made...
June 19, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28641861/permanent-his-bundle-pacing-in-intra-hisian-conduction-block-mechanistic-insights
#11
Bengt Herweg, Paul Z Gerczuk, Aamir Sofi, Pugazhendhi Vijayaraman, S Serge Barold
We are reporting a patient with discrete intra-His conduction block and describe a refined technique of permanent His bundle pacing assuring reliable ventricular capture. Meticulous mapping of the site of block with lead placement distal to the site of block and non-selective His bundle pacing with local myocardial capture as an additional safety back up appears to be the technique of choice.
June 9, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28641847/lotus-valve-increasing-the-pace-of-device-iterations
#12
EDITORIAL
Philippe Généreux
No abstract text is available yet for this article.
June 26, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28641846/conduction-abnormalities-and-permanent%C3%A2-pacemaker-implantation-after-transcatheter-aortic-valve-replacement-using-the-repositionable-lotus-device-the-united-kingdom-experience
#13
Rajiv Rampat, M Zeeshan Khawaja, Roland Hilling-Smith, Jonathan Byrne, Philip MacCarthy, Daniel J Blackman, Arvindra Krishnamurthy, Ashan Gunarathne, Jan Kovac, Adrian Banning, Raj Kharbanda, Sami Firoozi, Stephen Brecker, Simon Redwood, Vinayak Bapat, Michael Mullen, Suneil Aggarwal, Ganesh Manoharan, Mark S Spence, Saib Khogali, Maureen Dooley, James Cockburn, Adam de Belder, Uday Trivedi, David Hildick-Smith
OBJECTIVES: The authors report the incidence of pacemaker implantation up to hospital discharge and the factors influencing pacing rate following implantation of the LOTUS bioprosthesis (Boston Scientific, Natick, Massachusetts) in the United Kingdom. BACKGROUND: Transcatheter aortic valve replacement (TAVR) is associated with a significant need for permanent pacemaker implantation. Pacing rates vary according to the device used. The REPRISE II (Repositionable Percutaneous Replacement of Stenotic Aortic Valve Through Implantation of Lotus Valve System) trial reported a pacing rate of 29% at 30 days after implantation of the LOTUS device...
June 26, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28641799/the-continued-search-for-physiological%C3%A2-pacing-where-are-we-now
#14
REVIEW
Pugazhendhi Vijayaraman, Pierre Bordachar, Kenneth A Ellenbogen
Cardiac pacing is an effective treatment for patients with bradycardia due to sinus node dysfunction or atrioventricular block. Despite decades of technological advances, the optimal ventricular pacing site to mimic normal human ventricular physiology and best hemodynamic response remains elusive. Beginning with atrial synchronous right ventricular (RV) apical pacing, the search has continued through alternate RV pacing sites, minimizing RV pacing, biventricular pacing, left ventricular (LV) pacing, and His-bundle pacing...
June 27, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28641172/the-impact-of-speed-and-time-on-gait-dynamics
#15
Kathleen S Thomas, Daniel M Russell, Bonnie L Van Lunen, Sheri R Colberg, Steven Morrison
To determine the effects of speed on gait previous studies have examined young adults walking at different speeds; however, the small number of strides may have influenced the results. The aim of this study was to investigate the immediate and long-term impact of continuous slow walking on the mean, variability and structure of stride-to-stride measures. Fourteen young adults walked at a constant pace on a treadmill at three speeds (preferred walking speed (PWS), 90% and 80% PWS) for 30 min each. Spatiotemporal gait parameters were computed over six successive 5-min intervals...
June 19, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28641127/deep-brain-stimulation-of-subthalamic-nucleus-helps-in-improving-late-phase-motor-planning-in-parkinson-s-disease
#16
Patil Ashlesh, Sood Sanjay Kumar, Kochhar Kanwal Preet, Goyal Vinay
OBJECTIVE: Deep brain stimulation of subthalamic nucleus (DBS-STN) is a well-accepted treatment for Parkinson's disease (PD) but its effect on motor planning in the disease is yet unclear. This study examines the effect of switching the stimulation ON and OFF on components of bereitschaftspotentials in PD. PATIENTS AND METHODS: Scalp bereitschaftspotentials were recorded during self-paced right wrist extensions at Fz, Cz, Pz, C3 and C4 sites in patients on DBS-STN plus medications (DBS-STN group) as treatment modality or on medications only (Med group) and compared with age matched healthy controls...
June 15, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28641058/acute-kinematics-changes-in-marathon-runners-using-different-footwear
#17
Tania Socorro Amorim Soares, Camila Fonseca de Oliveira, Federico Pizzuto, Rui Manuel Garganta, João Paulo Vila-Boas, Mario Casimiro da Anunciação Paiva
The effects of running with or without shoes on injury prevention have been extensively studied, and several investigations have assessed biomechanical differences between them. However, findings are not consensual and further insights on biomechanical load associated with differently shod or barefoot conditions may be needed. This study aimed to observe if habitually shod marathon runners show acute alterations when running barefoot or with minimalist shoes, and to determine whether the running kinematical adaptations of wearing minimalist shoes were similar to barefoot running...
June 22, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28640889/contrasting-academic-and-lay-press-print-coverage-of-the-2013-2016-ebola-virus-disease-outbreak
#18
Mark D Kieh, Elim M Cho, Ian A Myles
Under a traditional paradigm, only those with the expected background knowledge consume academic literature. The lay press, as well as government and non-government agencies, play a complementary role of extracting findings of high interest or importance and translating them for general viewing. The need for accurate reporting and public advising is paramount when attempting to tackle epidemic outbreaks through behavior change. Yet, public trust in media outlets is at a historic low. The Crisis and Emergency Risk Communication (CERC) model for media reporting on public health emergencies was established in 2005 and has subsequently been used to analyze media reporting on outbreaks of influenza and measles as well as smoking habits and medication compliance...
2017: PloS One
https://www.readbyqxmd.com/read/28639815/a-multivariate-meta-analysis-of-motivational-interviewing-process-and-outcome
#19
Brian T Pace, Aaron Dembe, Christina S Soma, Scott A Baldwin, David C Atkins, Zac E Imel
Motivational interviewing (MI) theory proposes a process whereby a set of therapist behaviors has direct effects on client outcomes and indirect effects through in-session processes (e.g., client change talk). Despite clear empirical support for the efficacy of MI across settings, the results of studies evaluating proposed links between MI process and outcome have been less clear. In the present study, we used a series of multivariate meta-analyses to test whether there are differential relationships between specific MI-consistent and MI-inconsistent therapist behaviors, MI therapist global ratings, client change language, and clinical outcomes...
June 22, 2017: Psychology of Addictive Behaviors: Journal of the Society of Psychologists in Addictive Behaviors
https://www.readbyqxmd.com/read/28639747/the-effect-of-activation-rate-on-left-atrial-bipolar-voltage-in-patients-with-paroxysmal-atrial-fibrillation
#20
Steven E Williams, Nick Linton, Louisa O'Neill, James Harrison, John Whitaker, Rahul Mukherjee, Christopher A Rinaldi, Jaswinder Gill, Steven Niederer, Matthew Wright, Mark O'Neill
INTRODUCTION: Bipolar voltage is used during electroanatomic mapping to define abnormal myocardium, but the effect of activation rate on bipolar voltage is not known. We hypothesized that bipolar voltage may change in response to activation rate. By examining corresponding unipole signals we sought to determine the mechanisms of such changes. METHODS AND RESULTS: LA extrastimulus mapping was performed during CS pacing in 10 patients undergoing 1(st) time paroxysmal atrial fibrillation ablation...
June 22, 2017: Journal of Cardiovascular Electrophysiology
keyword
keyword
15398
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"